JP2009508053A - Vehicle tank for liquid reducing agent, especially urea solvent - Google Patents

Vehicle tank for liquid reducing agent, especially urea solvent Download PDF

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JP2009508053A
JP2009508053A JP2008530489A JP2008530489A JP2009508053A JP 2009508053 A JP2009508053 A JP 2009508053A JP 2008530489 A JP2008530489 A JP 2008530489A JP 2008530489 A JP2008530489 A JP 2008530489A JP 2009508053 A JP2009508053 A JP 2009508053A
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vehicle tank
tank
tank according
vehicle
pot
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JP5108770B2 (en
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ヘーベラー ライナー
ホルン マティアス
ヴァリス クリストフ
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Robert Bosch GmbH
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
    • F01N3/2066—Selective catalytic reduction [SCR]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K13/00—Arrangement in connection with combustion air intake or gas exhaust of propulsion units
    • B60K13/04—Arrangement in connection with combustion air intake or gas exhaust of propulsion units concerning exhaust
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
    • B60K15/03—Fuel tanks
    • B60K2015/03328—Arrangements or special measures related to fuel tanks or fuel handling
    • B60K2015/03427—Arrangements or special measures related to fuel tanks or fuel handling for heating fuel, e.g. to avoiding freezing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/10—Adding substances to exhaust gases the substance being heated, e.g. by heating tank or supply line of the added substance
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/14—Arrangements for the supply of substances, e.g. conduits
    • F01N2610/1406—Storage means for substances, e.g. tanks or reservoirs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/14—Arrangements for the supply of substances, e.g. conduits
    • F01N2610/1466—Means for venting air out of conduits or tanks
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Gas After Treatment (AREA)

Abstract

本発明によれば、内燃機関の排ガス内の窒素酸化物を還元するための水溶性の尿素溶剤のための、プラスチック製の車両タンク（１；２１；４１；５１；６２；１２１）が提案されている。この車両タンクは、有利な形式で機能ユニットを有しており、この機能ユニットは、少なくとも１つのポンプ（５７）と、少なくとも１つの圧力調整弁（６１）と、電気的なヒータが組み込まれている少なくとも１つの内部容器（４３，１２９）と、少なくとも１つの吸込み管路（５５；６３；１６３）とを有している。この機能ユニットは、有利な形式でタンクに形成された開口内に挿入され、この開口を蓋状にシールしている。  According to the invention, a plastic vehicle tank (1; 21; 41; 51; 62; 121) is proposed for a water-soluble urea solvent for reducing nitrogen oxides in the exhaust gas of an internal combustion engine. ing. This vehicle tank has a functional unit in an advantageous manner, which incorporates at least one pump (57), at least one pressure regulating valve (61) and an electric heater. At least one inner container (43, 129) and at least one suction line (55; 63; 163). This functional unit is inserted in an advantageous manner into an opening formed in the tank and seals this opening in the form of a lid.

Description

従来技術
ディーゼル燃料で駆動される車両においては、近年中に延期された、より厳格な排ガス規制法に基づいて、特に有害物質ＮＯｘを著しく低減させる必要がある。使用される方式は、有害物質ＮＯｘ（Stichoxide;窒素酸化物）が水溶性の尿素溶剤を用いてＮ２及びＨ２Ｏに還元させるＳＣＲ法（selective catalytic reduction）である。このために、水溶性の尿素溶剤がＳＣＲ触媒の前で排ガス導管内に調量弁を介して噴射される。水溶性の尿素溶剤は、熱い排ガスを気化させ、アンモニアを形成する。このアンモニアがＳＣＲ触媒内に堆積される。触媒内に堆積されたアンモニアは、排ガス内に含有される窒素酸化物を基本窒素と水蒸気とに変換する。水溶性の尿素溶剤はタンク内に蓄えられる。このような還元剤はタンクに対して特別な要求を課す。実用車両ではＳＣＲ法は既に大量生産されている。この場合、エンジンの冷却水を介して加熱されるタンクは特殊鋼又はアルミニウムより成るタンクが使用されている。 Prior Art In vehicles driven by diesel fuel, it is particularly necessary to significantly reduce harmful substances NOx based on the stricter exhaust gas regulations that have been postponed in recent years. The method used is an SCR method (selective catalytic reduction) in which a harmful substance NOx (Stichoxide) is reduced to N 2 and H 2 O using a water-soluble urea solvent. For this purpose, a water-soluble urea solvent is injected through the metering valve into the exhaust gas conduit in front of the SCR catalyst. The water-soluble urea solvent vaporizes hot exhaust gas and forms ammonia. This ammonia is deposited in the SCR catalyst. The ammonia deposited in the catalyst converts nitrogen oxides contained in the exhaust gas into basic nitrogen and water vapor. Water-soluble urea solvent is stored in the tank. Such reducing agents impose special requirements on the tank. For practical vehicles, the SCR method has already been mass-produced. In this case, a tank made of special steel or aluminum is used as a tank heated through engine cooling water.

発明の開示
アルミニウム又は特殊鋼より製造されたタンクは高価であって、しかも限定的な形状付与しか得られない。そのような理由により、種々異なる構造を有するプラスチックタンクが提案されている。プラスチックタンクは特に安価にブロー成形法により製造することができる。 DISCLOSURE OF THE INVENTION Tanks made from aluminum or special steel are expensive and only give a limited shape. For these reasons, plastic tanks having different structures have been proposed. The plastic tank can be manufactured by a blow molding method at a particularly low cost.

その他の利点は、従属請求項並びに以下の説明に記載されている。   Other advantages are set forth in the dependent claims as well as in the following description.

図面の簡単な説明
図１ａは、本発明による還元剤タンクのタンク壁２、
図１ｂは、内容物を有する還元剤タンク、
図２は、絶縁層を備えた還元剤タンク、
図３は、加熱ロッドを備えた還元剤タンク、
図４は、組み込まれたポット型部分、
図５は、管路を有する還元剤タンク、
図６は、管路とポット型部分の管路とを有する還元剤タンク、
図７は、絞りを備えた管路を有する還元剤タンク、
図８は、面状のアルミニウム体、
図９は、ポット型部分とヒータとを有する還元剤タンク、
図１０は、還元剤タンクのポット型部分、
図１１は、ヒータ、
図１２は、ポット型部分と容器とを備えた還元剤タンク、
図１３は、搬送モジュール、
図１４は、換気部材を有するタンクの概略図を示す。 BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 a shows a tank wall 2 of a reducing agent tank according to the invention,
FIG. 1b shows a reducing agent tank with contents,
FIG. 2 shows a reducing agent tank with an insulating layer,
FIG. 3 shows a reducing agent tank with a heating rod,
FIG. 4 shows an embedded pot-shaped part,
FIG. 5 shows a reducing agent tank having a pipeline,
FIG. 6 shows a reducing agent tank having a pipe line and a pot-type part pipe line,
FIG. 7 shows a reducing agent tank having a pipeline with a restriction,
FIG. 8 shows a planar aluminum body,
FIG. 9 shows a reducing agent tank having a pot-type part and a heater,
FIG. 10 shows a pot-shaped part of the reducing agent tank,
FIG. 11 shows a heater,
FIG. 12 shows a reducing agent tank having a pot-shaped part and a container,
FIG. 13 shows a transfer module,
FIG. 14 shows a schematic view of a tank having a ventilation member.

本発明の実施例
図１は、タンク壁２を備えたタンク１の部分図ｂの概略図（充てんのためのタンク開口若しくは排ガス後処理装置への接続部は示していない）を示す。タンクは、プラスチック例えばＰＥ（ポリエチレン）、ＰＡ（ポリアミド）、ＰＡＡ（ポリアリルアミド；Polyarylamid）よりなっている。還元剤「水溶性の尿素溶剤」においては、アンモニアが外部に拡散することは、容器壁によって避けなければならない。これは、相応に厚い壁厚またはいわゆるＣｏｅｘ−材料によって確実にされる。Ｃｏｅｘ−材料においては、容器壁は複数の異なる材料層より成っており、この場合、例えば１つの層は遮断層を成している。Ｃｏｅｘ−材料は、一般的に多層複合体の共押し出しによって製造される。図１ａは、タンク充てん部側に面した内側の層１１と外側の層１３と、この内側の層と外側の層との間に配置された層１５との３つの部分層から成っている。水溶性の尿素溶剤５は、−１１℃を下回る温度で凍結する。液面の上にはエアクッションが存在している。前記タンクの周囲の温度は−１１℃より低いので、タンクはまず底部及び壁部に近い領域が凍結する。エアクッション７は、液体上で絶縁部として用いられるので、上面の液体はまず端部から凍結する。それによって液体上のエアクッションは、凍結した水溶性の尿素溶液のための補償容積として用いられる。底部及び壁部の凍結が所望に行われることによって、タンクのタンクが破裂することはない。何故ならば、容積の増大分は、タンクの空気によって満たされた領域内に集中的にガイドされるからである。図１ｂには、○で囲んだ符号１〜４によって、タンク充填物が−１１℃を下回ると凍る範囲の連続を示す。これによって、エアクション７の領域でタンク中央に盛り上がり９が形成される。 FIG. 1 shows a schematic view of a partial view b of a tank 1 with a tank wall 2 (not shown for tank opening for filling or connection to an exhaust gas aftertreatment device). The tank is made of plastic such as PE (polyethylene), PA (polyamide), PAA (polyallylamid). In the reducing agent “water-soluble urea solvent”, the diffusion of ammonia to the outside must be avoided by the container wall. This is ensured by a correspondingly thick wall thickness or so-called Coex-material. In the Coex-material, the container wall consists of a number of different material layers, in which case one layer forms a barrier layer, for example. Coex-materials are generally manufactured by coextrusion of multilayer composites. FIG. 1a consists of three partial layers: an inner layer 11 facing the tank filling side, an outer layer 13 and a layer 15 arranged between this inner layer and the outer layer. The water-soluble urea solvent 5 freezes at a temperature below −11 ° C. An air cushion exists above the liquid surface. Since the temperature around the tank is lower than −11 ° C., the tank first freezes in the area near the bottom and the wall. Since the air cushion 7 is used as an insulating portion on the liquid, the liquid on the upper surface is first frozen from the end portion. The air cushion above the liquid is thereby used as a compensation volume for the frozen water-soluble urea solution. By freezing the bottom and walls as desired, the tank of the tank will not rupture. This is because the volume increase is intensively guided in the area filled with tank air. In FIG. 1b, the continuation of the range in which the tank filling freezes when it falls below −11 ° C. is indicated by reference numerals 1 to 4 surrounded by circles. As a result, a rise 9 is formed in the center of the tank in the area of the action 7.

図２は、プラスチックと、タンク底部に取り付けられた耐熱性の絶縁層の形の付加的な絶縁体２３とから成るタンク壁２を備えたタンク２１を示す。−１１℃での位相の変化において、水溶性の尿素溶剤は約７％膨張する。このような容積増大によって、タンクが損傷を被ることになる。付加的な補助手段若しくは備えによって、タンク内部の場所的にコントロールされた凍結が実施されるが、この場合、タンクは完全に満たされていない、つまり液面上にエアクションが存在することを前提としている。絶縁材料（ここでは絶縁体２３）をタンクの所定箇所に取り付けることによって、タンク内の凍結過程を局所的に所望に導くことができる。この絶縁体は、氷の増大が、容器にとって危険でない所定の領域にずらされるように、例えばエアアクションが実現される表面にシフトされるように、選択することができる。底部における絶縁体２３は空間的な凍結特性を次のように変化させる。つまり、タンクの中央（○で囲まれた符号５参照）においてまだ凍結していない液体を有する領域が非常に長く維持されるように変化させる。これによって、一方ではタンクにおける機械的な氷の力が小さくなり、他方では低い温度でも、吸込み可能な、排ガス後処理装置の運転のために使用可能な液体を有するタンクの領域が比較的長く提供される。○で囲まれた符号１〜５は、図１と同様に、−１１℃の温度を下回った時にタンク充填物が凍結する領域の連続を示す。   FIG. 2 shows a tank 21 with a tank wall 2 consisting of plastic and an additional insulator 23 in the form of a heat-resistant insulating layer attached to the tank bottom. In the phase change at -11 ° C, the water-soluble urea solvent expands by about 7%. Such an increase in volume results in damage to the tank. With additional auxiliary means or provisions, a locally controlled freezing inside the tank is carried out, assuming that the tank is not completely filled, i.e. there is an action on the liquid level. It is said. By attaching an insulating material (here, the insulator 23) to a predetermined portion of the tank, the freezing process in the tank can be guided locally as desired. This insulator can be selected such that the increase in ice is shifted to a predetermined area that is not dangerous for the container, for example, to a surface where air action is achieved. The insulator 23 at the bottom changes the spatial freezing characteristics as follows. That is, it is changed so that the region having the liquid that has not been frozen yet is maintained very long in the center of the tank (see reference numeral 5 surrounded by a circle). This reduces the mechanical ice forces in the tank on the one hand and provides a relatively long tank area with liquid usable for operation of the exhaust gas aftertreatment device, which can be sucked in on the other hand at low temperatures. Is done. Reference numerals 1 to 5 surrounded by circles indicate the continuation of the region where the tank filling freezes when the temperature falls below -11 ° C., as in FIG.

例えば電気的なヒータを介して、又はタンクに熱接触している管路を介して循環するモータ冷却水を介して行われる凍結解除過程つまり溶融過程において、溶融熱が、所望の部分容積に集中せしめられる。図３には、電気的な溶融メカニズム、電気的な加熱ロッド３２及びその電気接続部を備えたタンクが示されている。限定的な管路だけが提供されているので、限定的な氷容積３４（タンク内の充填レベルに基づいている）だけが、勿論短時間で形成されるので、後置接続された排ガス後処理装置若しくはタンク装置は、最短時間で運転準備状態にある。殆ど空のタンク若しくは低い充填レベルにおいて、溶融のために提供される容積は非常に小さい、つまり短い移動区間の後に、形成された還元剤はもはや提供されない。特に加熱ロッド周囲の液体は吸い込まれ、それによって熱は空気を介して、凍結した還元剤に伝達されることはない。   For example, the heat of fusion concentrates on the desired partial volume in the freeze release process, ie the melting process, which is carried out via an electric heater or through motor cooling water circulating through a conduit in thermal contact with the tank. I'm damned. FIG. 3 shows a tank with an electrical melting mechanism, an electrical heating rod 32 and its electrical connections. Since only a limited line is provided, only a limited ice volume 34 (based on the filling level in the tank) is of course formed in a short time, so that the exhaust gas aftertreatment connected downstream. The device or tank device is ready for operation in the shortest time. In almost empty tanks or low filling levels, the volume provided for melting is very small, i.e. after a short moving section, the reducing agent formed is no longer provided. In particular, the liquid around the heating rod is sucked so that no heat is transferred to the frozen reducing agent via the air.

溶融された部分容積が全タンク容積に対して熱的に絶縁されていれば、有利である。さらに、提供された熱は凍結した全容積に分配され、溶融時間を早くする。小さい部分容積に集中すると、システムは最短時間でも凍結準備状態となる。図４には、プラスチック壁２を備えたタンク４１が示されており、このプラスチック壁２はその内部にポット形部分４３を有していて、このポット形部分４３は部分容積を残留タンクの容積に対して仕切っている。図示していない加熱エレメントは、図３に示した加熱エレメントと同じであって、部分容積を所望に加熱若しくは溶融（凍結解除）するために、この部分容積内又はポット形部分の壁部、特にその内側に配置されている。ポット形部分は有利な形式で、タンクの内部に位置決めされている。これによって、液体がまず壁部に近い領域において凍結され、次いで中央の液体が凍結されるようになるので、有利である。最後にタンク中央部も凍結されるまで、比較的長くかかるので、外気温度が−１１℃より低い場合でも、タンク中央内に位置決めされたポット形部分においてヒータは希にしかスイッチオンされない。このようなポット形部分は、図５において後述されているように、オーバーフローを有していてよい。   It is advantageous if the molten partial volume is thermally insulated from the total tank volume. Furthermore, the heat provided is distributed to the entire frozen volume, speeding up the melting time. When concentrating on a small partial volume, the system is ready for freezing in the shortest possible time. FIG. 4 shows a tank 41 with a plastic wall 2, which has a pot-shaped part 43 in its interior, the pot-shaped part 43 displacing the partial volume of the residual tank. Partitioning against. The heating element not shown is the same as the heating element shown in FIG. 3, in order to heat or melt (unfreeze) the partial volume as desired, in particular in the partial volume or in the walls of the pot-shaped part, in particular It is arranged on the inside. The pot-shaped part is advantageously positioned in the tank. This is advantageous because the liquid is first frozen in the region close to the wall and then the central liquid is frozen. Since it takes a relatively long time until the tank central part is finally frozen, even when the outside air temperature is lower than -11 ° C., the heater is rarely switched on in the pot-shaped part positioned in the tank center. Such pot-shaped portions may have an overflow, as will be described later in FIG.

図５は、タンク装置若しくはタンク５１を示しており、このタンク装置若しくはタンク５１内に（タンク中央に）配置されたポット形部分４３は常に完全に満たされている。それによって、ポット形部分の永久的な充填は、次のようにして保証される。つまり、搬送モジュール内に設けられたポンプ５７によってポット形部分の外から、つまりポット形部分以外のタンク（残留タンク）から、液体が管路５５を介して、詳しく図示していない後置された排ガス後処理装置にポンプ供給される。このシステムの機械的な圧力制御は、機械的な圧力調整弁６１を介して行われる。この圧力調整弁６１は搬送モジュール内に組み込まれており、この場合、この圧力調整弁６１のオーバーフロー量は、戻し管路５９を介してポット形部分４３内に流入する。これによって、ポット形部分は常に最大に充填されており、余剰の量だけがオーバーフロー５３を介して外側のタンク領域に向かってタンク４３から溢流する。低い温度においては、まずポット形部分内に存在する氷が、詳しく図示してない、ポット形部分の領域内に配置された電気的な加熱部材によって有利な形式で完全に溶融されるので、残留タンクの氷はまだ溶融されない。ポット形部分４３もプラスチックより成っていて、それによって溶融しようとするポット形部分と凍結した全容積との間の絶縁層を形成する。   FIG. 5 shows a tank device or tank 51, and the pot-shaped part 43 arranged in the tank device or tank 51 (in the center of the tank) is always completely filled. Thereby, permanent filling of the pot-shaped part is ensured as follows. That is, the liquid 57 was placed behind the outside of the pot-shaped portion, that is, from the tank (residual tank) other than the pot-shaped portion via the pipe line 55 by the pump 57 provided in the transfer module. Pumped to exhaust gas aftertreatment device. The mechanical pressure control of this system is performed via a mechanical pressure regulating valve 61. The pressure regulating valve 61 is incorporated in the transport module. In this case, the overflow amount of the pressure regulating valve 61 flows into the pot-shaped portion 43 through the return pipe 59. As a result, the pot-shaped part is always filled to the maximum, and only the surplus amount overflows from the tank 43 via the overflow 53 towards the outer tank area. At low temperatures, first the ice present in the pot-shaped part is completely melted in an advantageous manner by means of electrical heating elements arranged in the region of the pot-shaped part, not shown in detail, so that residual The tank ice is not yet melted. The pot-shaped part 43 is also made of plastic, thereby forming an insulating layer between the pot-shaped part to be melted and the entire frozen volume.

図６にはタンク装置６２が示されており、このタンク装置６２は、ポット形部分４３内でポット形部分の管路６３を付加的に有している。ポット形部分の管路６３は、搬送モジュールの直前で、オーバーフロー５３の上側において管路５５に接続されていて、ポット形部分から吸い込んで、後置接続された排ガス後処理装置に還元剤を供給する。タンク内に開口する管路５５はその吸込み開口６７が、凍結された残留タンクによって閉鎖されていれば、ポット形部分内に存在する、既に溶融したポット形部分の管路６３を通ってポット形部分から、溶融された還元剤が吸い込まれる。この場合、タンク６２は、ポット形部分４３の底部領域内に配置された電気的なヒータ６５を有している。搬送モジュールとは、以下の構成部材、つまりポンプ５７、圧力調整弁６１（選択的に付加的な戻し管路５９も含む）、管路５５及びポット形部分の管路６３のすべてのことである。   FIG. 6 shows a tank device 62, which additionally has a pot-shaped portion pipe 63 in the pot-shaped portion 43. The pot-shaped part pipe line 63 is connected to the pipe line 55 on the upper side of the overflow 53 immediately before the transfer module, and sucks from the pot-shaped part and supplies the reducing agent to the exhaust gas aftertreatment device connected downstream. To do. The pipe 55 that opens into the tank is pot-shaped through the already melted pot-shaped section pipe 63 present in the pot-shaped section if its suction opening 67 is closed by a frozen residual tank. From the part, the molten reducing agent is sucked. In this case, the tank 62 has an electric heater 65 arranged in the bottom region of the pot-shaped portion 43. The transport module is all of the following components: the pump 57, the pressure regulating valve 61 (optionally including an additional return line 59), the line 55 and the pot-shaped part line 63. .

ポット形部分４３が常に満たされていれば有利である。それによって、ポット形部分の溶融後に短時間で、常に十分な量の吸い込まれた還元剤が提供される。溶融された状態（ポット形部分と残留タンク）で同時に、管路５５及び６３を介して、ポット形部分からも、また残留タンクからも吸い込まれるようになっていれば、常に満たされたポット形部分の原理が実現される。これは、図７に示した配置構成では、管路５５及び６３内の相応の絞りを介して示されている。管路５５は第１の絞り７５を有しており、ポット形部分の管路６３が第２の絞り７７を有している。この場合、残留タンクから吸い込まれた液体が、排ガス管路内に噴射される量よりも常に多いことを考慮する必要がある。これによって、圧力調整器の戻し管路を介して永久的に満たされるポット形部分４３が保証される。ポット形部分４３のオーバーフロー５３を介して、余剰の還元剤が場合によっては外側のタンク領域に戻し案内される（戻し量７３）。   It is advantageous if the pot-shaped part 43 is always filled. Thereby, a sufficient amount of sucked reducing agent is always provided in a short time after melting of the pot-shaped part. If in the melted state (pot-shaped part and residual tank) at the same time, both from the pot-shaped part and from the residual tank via the lines 55 and 63, the filled pot-type The principle of the part is realized. This is shown in the arrangement shown in FIG. 7 via a corresponding restriction in lines 55 and 63. The pipe 55 has a first throttle 75, and the pot-shaped portion of the pipe 63 has a second throttle 77. In this case, it is necessary to consider that the amount of liquid sucked from the residual tank is always larger than the amount injected into the exhaust gas pipe. This ensures a pot-shaped part 43 that is permanently filled via the pressure regulator return line. Through the overflow 53 of the pot-shaped portion 43, surplus reducing agent is guided back to the outer tank region in some cases (return amount 73).

図８に示した実施例では、ヒータ６５はフラットなアルミニウム体８１の形状を有しており、このアルミニウム体８１内に単数又は複数の点状の加熱エレメント８３が組み込まれている。この加熱エレメント８３は、例えば高い温度で自動的に低下制御されるＰＴＣ加熱エレメント（"ＰＴＣ"＝Positve Temperature Coefficient）である。点状の加熱エレメントは、ポット形部分領域内で熱をフラットな（面状の）アルミニウム体に引き渡す。この場合、熱の流れは矢印８５で示されている。良好な熱伝導率に基づいて、アルミニウムが有利である。アルミニウム体の中央に設けられた孔８２は、アルミニウム体をホルダに固定するためのものである。   In the embodiment shown in FIG. 8, the heater 65 has the shape of a flat aluminum body 81, and one or a plurality of point-like heating elements 83 are incorporated in the aluminum body 81. The heating element 83 is, for example, a PTC heating element (“PTC” = Positve Temperature Coefficient) that is automatically controlled to decrease at a high temperature. The point-like heating element delivers heat to a flat (planar) aluminum body in the pot-shaped partial area. In this case, the heat flow is indicated by arrow 85. Based on good thermal conductivity, aluminum is advantageous. The hole 82 provided in the center of the aluminum body is for fixing the aluminum body to the holder.

図９には、プラスチック射出成形によってプラスチックに埋め込まれた面状のアルミニウム体８１の形状のヒータ９１の配置の可能性が示されている。内部に電流供給源９３が組み込まれているロッド状のホルダ９３によって、この面状の加熱構造は、組み込まれたＰＴＣ加熱エレメントと共にポット形部分の底部近傍に取り付けられている。プラスチック射出成形部は、ＰＴＣ加熱エレメント若しくはアルミニウム体を水溶性の尿素溶剤から保護するために用いられる。   FIG. 9 shows the possibility of arranging the heater 91 in the form of a planar aluminum body 81 embedded in plastic by plastic injection molding. By means of a rod-shaped holder 93 in which a current supply source 93 is incorporated, this planar heating structure is attached in the vicinity of the bottom of the pot-shaped part together with the incorporated PTC heating element. The plastic injection molding part is used to protect the PTC heating element or the aluminum body from a water-soluble urea solvent.

図１０は、ポット形部分４３内のヒータの配置を示しており、この場合、プラスチック射出成形によってプラスチックに埋め込まれた面状のアルミニウム体８１が縁部において複数の対流孔１０３を有しており、これらの対流孔１０３は、アルミニウム体の下の底部近傍に存在する還元剤中央領域を、アルミニウム体の上側領域に接続している。このヒータは対流を形成し、この際、対流孔の周囲を巡って対流（循環流１０５）が形成される。このヒータの空間的な配置は、まず加熱体の周囲において溶融されるように、作用する。上方に向けられた対流を介して、既に溶融された媒体の熱が連続的に上方に運ばれる。ここで冷却されて、再びヒータに向かって下方に落下する。これによってヒータから上方に向かって、特にアルミニウムに設けられた対流孔の領域内で流れの循環が発生する。所定の時間後に、溶融された熱の流れが氷の表面に達する。それによってポット形部分内の部分容積が部分的に溶融される（溶融した領域１０７、まだ凍っている領域１０９）。ポット形部分の管路６３の吸込み部と空気との間で、溶融された液体を介して接続が形成されると（氷の表面まで、若しくはエアクッションまで溶融した領域１０８）、吸い込まれたポット形部分の管路６３が同様に溶融されることによって、システムの運転が開始される。部分容積内にまだ存在する氷の、有利には表面における容積は、圧力制御弁を介して戻り案内された暖かい媒体１１によっても、付加的に溶融される。この暖かい媒体は、表面に残存する氷の残りに落下し、それによって溶融過程を促進する。   FIG. 10 shows the arrangement of the heater in the pot-shaped portion 43. In this case, a planar aluminum body 81 embedded in plastic by plastic injection molding has a plurality of convection holes 103 at the edge. These convection holes 103 connect the central region of the reducing agent present near the bottom of the aluminum body to the upper region of the aluminum body. This heater forms convection, and at this time, convection (circulation flow 105) is formed around the convection hole. This spatial arrangement of the heaters acts so that it is first melted around the heating element. Via the upwardly directed convection, the heat of the already melted medium is continuously carried upwards. It is cooled here and falls downward again toward the heater. This causes a circulation of the flow upward from the heater, particularly in the region of the convection holes provided in the aluminum. After a predetermined time, the molten heat stream reaches the ice surface. Thereby, the partial volume in the pot-shaped part is partially melted (melted area 107, still frozen area 109). When a connection is formed via the melted liquid between the suction part of the pipe 63 in the pot-shaped part and the air (the melted area 108 to the ice surface or to the air cushion), the sucked pot The system operation is started by the melting of the pipe 63 of the shaped part as well. The volume of ice still present in the partial volume, preferably at the surface, is additionally melted by the warm medium 11 guided back through the pressure control valve. This warm medium falls to the rest of the ice remaining on the surface, thereby accelerating the melting process.

図１１は、例えば面状のアルミニウム体と一体的に接続された保持エレメントを有する、ポット形部分内に使用されるヒータ１１３の例を示す。この保持エレメント内に、ポット形部分から還元剤を吸い込むためのポット形部分の管路１６３が組み込まれている。ポット形部分１６３に対して平行に、電気的な供給ライン１１５が延在しており、この供給ラインは、単数又は複数のＰＴＣ加熱エレメント８３に電流を供給する。この場合、保持エレメントは、底部近傍の吸込み箇所を備えた組み込まれたポット形部分の管路６３と共に、前記面状のアルミニウム体と同様にプラスチック射出成形で埋め込まれている（図示せず）。ポット形部分の管路６３は、ポット形部分を介して搬送モジュールに通じている。ＰＴＣに通じる電気的なリード線（供給ライン１１５）は、抵抗ワイヤとして構成されている。このリード線は、ポット形部分の管路１６３の直ぐ近くに延在している。それによってポット形部分の管路１６３は、抵抗ワイヤに形成された熱を介して早期に溶融される。従って、このシステムは、ポット形部分内に存在する液体量を、運転を実現するために短時間で提供する。これによって短時間で、システムの運転が保証される。またこれによって、得られた溶融量によって、例えば約５００〜１０００ｋｍの距離を進むことができる。これは、この短時間後に、タンク全体内のさらなる水溶性の尿素溶剤が周囲の温度によって溶融され、これが部分的に管路５５を介して吸い込まれることを前提としている。   FIG. 11 shows an example of a heater 113 used in a pot-shaped part, for example having a holding element connected integrally with a planar aluminum body. In this holding element, a pot-shaped part pipe 163 for sucking the reducing agent from the pot-shaped part is incorporated. Parallel to the pot-shaped portion 163, an electrical supply line 115 extends, which supplies current to one or more PTC heating elements 83. In this case, the holding element is embedded by plastic injection molding (not shown) in the same manner as the planar aluminum body, together with the pipe 63 of the pot-shaped part with the built-in suction portion near the bottom. The pot-shaped portion pipe 63 communicates with the transfer module through the pot-shaped portion. The electrical lead wire (supply line 115) leading to the PTC is configured as a resistance wire. The lead wire extends in the immediate vicinity of the conduit 163 in the pot-shaped portion. Thereby, the pipe-shaped part 163 of the pot-shaped part is melted at an early stage through the heat formed in the resistance wire. Thus, this system provides the amount of liquid present in the pot-shaped part in a short time to realize operation. This ensures system operation in a short time. Moreover, this can advance the distance of about 500-1000 km, for example with the obtained melt amount. This presupposes that after this short time, further water-soluble urea solvent in the entire tank is melted by the ambient temperature and is partially sucked through the line 55.

図１２は、別のタンク装置１２１を示しており、この別のタンク装置１２１において、ポット形部分１４３の周囲に別の容器１２９が配置されている。この別の容器１２９は底部領域に溜まり部１２３つまり凹部を有しており、この別の容器１２９の最下部にスクリーンバルブ１２５が設けられている。この容器１２９は、タンクに通じるオーバーフロー１２７を有している。流体静力学的な圧力を介して、液体はスクリーンバルブ１２５を通って容器内に侵入する。この容器から液体は管路５５を介してポット形部分内に吸い込まれる。これによって、戻し量はまず内側のポット形部分を満たす。次いで液体はこの内側のポット形部分のオーバーフロー５３を介して別の容器１２９内に達する。この別の容器１２９が満たされると、液体は、オーバーフロー１２７を介してタンク内に戻る。ポット形部分１４３のオーバーフロー５３は、別の容器１２９のオーバーフロー１２７の上に位置している。つまりオーバーフロー１２７は、この容器１２９が、残留タンクよりも高い液体レベルを有するように、働く。これによって、容器から吸込む管路５５は、常に液体表面よりも著しく下に位置する。このような構造「容器内のポット形部分、タンク内の容器」によって、タンクは、液体の衝撃、氷の衝撃、空気の吸込み及び、液体がはねるぴちゃぴちゃ音及び氷の付着による雑音に対して保護される。タンクの中央において「容器内にポット形部分」を配置する構成によって、液体のはねる運動及び氷の衝撃に対して有利に作用する。タンク内で凍った液体は、凍結したリング（環状部）を形成し、このリングは、中央が容器によって把持され、それによって限定的な運動自由度を有している。   FIG. 12 shows another tank device 121, in which another container 129 is disposed around the pot-shaped portion 143. The other container 129 has a pool part 123, that is, a recess in the bottom region, and a screen valve 125 is provided at the lowermost part of the other container 129. The container 129 has an overflow 127 that leads to the tank. Through hydrostatic pressure, liquid enters the container through the screen valve 125. From this container, the liquid is sucked into the pot-shaped part via the line 55. Thereby, the return amount first fills the inner pot-shaped part. The liquid then reaches another container 129 via this inner pot-shaped part overflow 53. When this another container 129 is filled, the liquid returns to the tank via the overflow 127. The overflow 53 of the pot-shaped part 143 is located above the overflow 127 of another container 129. That is, overflow 127 works so that this container 129 has a higher liquid level than the residual tank. As a result, the pipeline 55 that draws in from the container is always located significantly below the liquid surface. With such a structure “pot-shaped part in the container, container in the tank”, the tank is protected against the impact of liquid impact, ice impact, air inhalation and noise caused by the splashing of liquid and the adhesion of ice. Is done. The arrangement of the “pot-shaped part in the container” in the center of the tank has an advantageous effect on the splashing movement of liquid and the impact of ice. The liquid frozen in the tank forms a frozen ring (annular part), which is gripped in the center by the container and thereby has a limited degree of freedom of movement.

図１３は、搬送モジュール１３３がポット形部分１４３内に侵入して設けられた実施例を示す。従って、付加的な管路及び接続箇所なしに直接的な経路でフィードモジュールとタンクとを接続することができる。フィードモジュールはさらに、タンク上で詳しく図示していないタンク壁の凹部内に位置決めされる。それによって、僅かな漏れがタンク表面に沿って周囲に達することがないか、若しくはまったく漏れ出すことがないように保証されている。何故ならば僅かな漏れは凹部内で見えなくなっているか若しくは凹部内に溜められているからである。これによって、漏れは車両内に達することはなく、凹部から容易に取り除くことができる。ヒータを有するポット形部分と、スクリーンバルブを備えた容器と、搬送モジュールとは、ほぼタンクから独立していて、全体がタンクから取り外すことができる１つの機能ユニットを形成している。この機能ユニットは、選択的に、還元剤の品質又は温度及び液体レベルのための相応のセンサとしても構成される。搬送モジュールは、閉鎖カバーによってタンクと同一平面を成すように覆うことができる。タンク構造は、すべての熱源（タンクヒータ、搬送モジュールの詳しく図示していないヒータ、ポンプモータ等）が機能ユニット内に集中されていて、それによってすべての熱源が共に、短い加熱周期を確実に得るために、タンクの中心領域内で溶融を実施するために貢献するように、構成されている。   FIG. 13 shows an embodiment in which the transport module 133 is provided to enter the pot-shaped portion 143. Therefore, it is possible to connect the feed module and the tank by a direct route without additional pipes and connection points. The feed module is further positioned in a recess in the tank wall not shown in detail on the tank. Thereby it is ensured that slight leaks do not reach the periphery along the tank surface or leak at all. This is because slight leakage is not visible in the recess or is stored in the recess. As a result, the leak does not reach the vehicle and can be easily removed from the recess. The pot-shaped part having the heater, the container provided with the screen valve, and the transfer module are substantially independent of the tank and form one functional unit that can be removed from the tank as a whole. This functional unit is optionally also configured as a corresponding sensor for the quality or temperature and liquid level of the reducing agent. The transport module can be covered by a closure cover so as to be flush with the tank. In the tank structure, all heat sources (tank heater, heater not shown in detail of the transfer module, pump motor, etc.) are concentrated in the functional unit, so that all the heat sources together ensure a short heating cycle. In order to contribute to performing the melting in the central region of the tank.

図１４は、タンク壁２を備えたタンクを概略的に示しており、この場合、ポット形部分、搬送モジュール等のその他の構成部分は詳しく図示されていない。タンク内容物は、水溶性の尿素溶剤の分解並びに温度変化、取り出しに基づいて、エアクション７の領域内においてタンク内で種々異なる圧力を形成することができる。周囲への吹き出し及び排気弁１４１若しくは１４５を介して、この圧力変動はコンピュータに伝達される。排気の際には、アンモニアが周囲に漏れだして、臭いのストレスを与える危険性があるので、排気過程は高いタンク内圧においてのみ実行される。つまりタンクは有利な形式で、許容できない程度の形状変形を必要とすることなしに、適度な内圧を補償できるように構成されている。場合によっては、活性炭フィルタを設けることができる。この活性炭フィルタは、排気の際にアンモニア願入ガスをガイドすることができる。   FIG. 14 schematically shows a tank provided with a tank wall 2, in which other components such as pot-shaped parts and transport modules are not shown in detail. The tank contents can create different pressures in the tank in the area of the action 7 based on the decomposition of the water-soluble urea solvent, temperature change and removal. This pressure fluctuation is transmitted to the computer via the blowout to the surroundings and the exhaust valve 141 or 145. During exhaust, the exhaust process is only performed at high tank internal pressures because ammonia leaks out to the environment and can cause odor stress. In other words, the tank is advantageous and is configured to compensate for moderate internal pressure without requiring unacceptable shape deformation. In some cases, an activated carbon filter can be provided. The activated carbon filter can guide the ammonia application gas during exhaust.

図１ａは、本発明による還元剤タンクのタンク壁２の部分的な断面図、図１ｂは、内容物を有する還元剤タンクの概略的な断面図である。FIG. 1a is a partial sectional view of a tank wall 2 of a reducing agent tank according to the present invention, and FIG. 1b is a schematic sectional view of a reducing agent tank having contents. 絶縁層を備えた還元剤タンクの概略的な断面図である。It is a schematic sectional drawing of the reducing agent tank provided with the insulating layer. 加熱ロッドを備えた還元剤タンクの概略的な断面図である。It is a schematic sectional drawing of the reducing agent tank provided with the heating rod. 組み込まれたポット型部分の概略的な断面図である。It is a schematic sectional drawing of the pot-type part incorporated. 管路を有する還元剤タンクの概略的な断面図である。It is a schematic sectional drawing of the reducing agent tank which has a pipe line. 管路とポット型部分管路とを有する還元剤タンクの概略的な断面図である。It is a schematic sectional drawing of a reducing agent tank which has a pipe line and a pot type partial pipe line. 絞りを備えた管路を有する還元剤タンクの概略的な断面図である。It is a schematic sectional drawing of a reducing agent tank which has a pipe line provided with a restriction. 面状のアルミニウム体の概略的な斜視図である。It is a schematic perspective view of a planar aluminum body. ポット型部分とヒータとを有する還元剤タンクの概略的な断面図である。It is a schematic sectional drawing of the reducing agent tank which has a pot type | mold part and a heater. 還元剤タンクのポット型部分の概略的な断面図である。It is a schematic sectional drawing of the pot type part of a reducing agent tank. ヒータの概略的な断面図である。It is a schematic sectional drawing of a heater. ポット型部分と容器とを備えた還元剤タンクの概略的な断面図である。It is a schematic sectional drawing of the reducing agent tank provided with the pot type | mold part and the container. 搬送モジュールの概略的な部分断面図である。It is a schematic fragmentary sectional view of a conveyance module. 換気部材を有するタンクの概略的な断面図である。It is a schematic sectional drawing of the tank which has a ventilation member.

Claims (27)

液状の例えば水溶性の還元剤のための、殊に内燃機関の排ガス内の窒素酸化物を還元するための尿素溶剤のための車両タンク（１；２１；４１；５１；６２；１２１）において、
車両タンクが、プラスチックより製造された容器壁（２；４３；１２９）を有していることを特徴とする、液状の還元剤、殊に尿素溶剤のための車両タンク。 In vehicle tanks (1; 21; 41; 51; 62; 121) for liquid, eg water-soluble reducing agents, in particular for urea solvents for reducing nitrogen oxides in the exhaust gas of internal combustion engines,
Vehicle tank for liquid reducing agent, in particular urea solvent, characterized in that the vehicle tank has a container wall (2; 43; 129) made of plastic. プラスチックタンクがブロー成形法で製造されている、請求項１記載の車両タンク。   The vehicle tank according to claim 1, wherein the plastic tank is manufactured by a blow molding method. 容器壁が複数の材料層（１１，１３，１５）より成っており、これらの材料層のうちの少なくとも１つが遮断層（１５）として構成されている、請求項１又は２記載の車両タンク。   The vehicle tank according to claim 1 or 2, wherein the container wall comprises a plurality of material layers (11, 13, 15) and at least one of these material layers is configured as a barrier layer (15). 尿素溶剤が殊に水溶性の尿素溶剤であって、少なくとも間接的にアンモニアを含有していて、前記遮断層（１５）が容器を通ってアンモニアが拡散するのを阻止する、請求項３記載の車両タンク。   4. A urea solvent, in particular a water-soluble urea solvent, containing at least indirectly ammonia and the barrier layer (15) prevents ammonia from diffusing through the container. Vehicle tank. 容器壁が断熱材（２３）を備えており、該断熱材（２３）が容器壁を部分的に覆うことによって、この断熱材が、所定の箇所において別の箇所よりも高い絶縁作用を有するように作用する、請求項１から４までのいずれか１項記載の車両タンク。   The container wall is provided with a heat insulating material (23), and the heat insulating material (23) partially covers the container wall so that the heat insulating material has a higher insulating action at a predetermined place than at another place. The vehicle tank according to claim 1, which acts on the vehicle. 車両タンクが、車両タンク内に配置された、還元剤の部分容積を受容するための内部容器（４３，１２９）を有していて、該内部容器が、車両タンクを部分タンクと残留タンクとに仕切っている、請求項１から５までのいずれか１項記載の車両タンク。   The vehicle tank has an inner container (43, 129) disposed in the vehicle tank for receiving a partial volume of the reducing agent, and the inner container converts the vehicle tank into a partial tank and a residual tank. The vehicle tank according to any one of claims 1 to 5, wherein the vehicle tank is partitioned. 内部容器がポット状（４３）に構成されていて、プラスチックより成っている、請求項６記載の車両タンク。   The vehicle tank according to claim 6, wherein the inner container is configured in a pot shape (43) and is made of plastic. 内部容器が、車両タンクのほぼ中央において容器壁部に対して間隔を保って配置されている、請求項７記載の車両タンク。   The vehicle tank according to claim 7, wherein the inner container is arranged at a distance from the container wall at substantially the center of the vehicle tank. 内部容器を巡ってスロッシュ容器（１２９）が配置されており、このスロッシュ容器（１２９）がその最深部に車両タンクに通じる開口を有している、請求項６から８までのいずれか１項記載の車両タンク。   9. The slosh container (129) is arranged around the inner container, and the slosh container (129) has an opening leading to the vehicle tank at its deepest part. 9. Vehicle tank. 前記開口内にスクリーンバルブ（１２５）が配置されており、このスクリーンバルブ（１２５）は、車両タンク内の高い液体レベルにおいて車両タンク内の還元剤の流体動力学的な圧力によって開放され、車両タンク内の低い液体レベルにおいて閉鎖するようになっている、請求項９記載の車両タンク。   A screen valve (125) is disposed in the opening, and the screen valve (125) is opened at a high liquid level in the vehicle tank by the hydrodynamic pressure of the reducing agent in the vehicle tank. 10. The vehicle tank according to claim 9, wherein the vehicle tank is adapted to close at a low liquid level. スクリーンバルブが、前記スロッシュ容器内の最深部（溜まり部１２３）の領域内に配置されている、請求項１０記載の車両タンク。   The vehicle tank according to claim 10, wherein a screen valve is disposed in a region of the deepest portion (reservoir portion 123) in the slosh container. 還元剤が前記内部容器内で加熱可能である、請求項６から１１までのいずれか１項記載の車両タンク。   The vehicle tank according to any one of claims 6 to 11, wherein the reducing agent can be heated in the inner container. 前記内部容器内に電気的なヒータ（３２，６５，８１，８３，９１，９３，１１３）が配置されている、請求項１２記載の車両タンク。   The vehicle tank according to claim 12, wherein an electric heater (32, 65, 81, 83, 91, 93, 113) is arranged in the inner container. 前記電気的なヒータが複数の自動制御式の加熱エレメント８３、例えばＰＴＣ加熱エレメントを有している、請求項１３記載の車両タンク。   14. A vehicle tank according to claim 13, wherein the electrical heater comprises a plurality of automatically controlled heating elements 83, for example PTC heating elements. 前記加熱エレメントがアルミニウム体（８１）上に配置されている、請求項１４記載の車両タンク。   Vehicle tank according to claim 14, wherein the heating element is arranged on an aluminum body (81). 前記アルミニウム体（８１）がプレート状に構成されていて、内部容器内に水平に配置されていて、その縦軸線に対して横方向に少なくとも１つの貫通孔（対流孔１０３）を有している、請求項１５記載の車両タンク。   The aluminum body (81) is configured in a plate shape, is horizontally disposed in the inner container, and has at least one through hole (convection hole 103) in a direction transverse to the longitudinal axis. The vehicle tank according to claim 15. 残留タンク内に第１の吸込み管路（管路５５）が配置されていて、部分タンク内に第２の吸込み管路（ポット形部分６３，１６３）が配置されており、これらの第１及び第２の吸込み管路が少なくとも１つのポンプに通じていて、該少なくとも１つのポンプの下流に、余剰の還元剤を前記部分タンクに導出する圧力制御弁が配置されている、請求項６から１６までのいずれか１項記載の車両タンク。   A first suction pipe (pipe line 55) is arranged in the residual tank, and a second suction pipe (pot-shaped parts 63, 163) is arranged in the partial tank. 17. A pressure control valve is provided, wherein the second suction line leads to at least one pump, and a pressure control valve is arranged downstream of the at least one pump to guide excess reducing agent to the partial tank. The vehicle tank according to any one of the preceding items. 第１の吸込み管路（５５）の横断面は、第１の吸込み管路（５５）を介して、排ガスを還元するために必要な最大量よりも多い還元剤を吸込むことができる、請求項１７記載の車両タンク。   The cross section of the first suction line (55) can suck more reducing agent than the maximum amount required to reduce the exhaust gas via the first suction line (55). The vehicle tank according to 17. 吸込み管路（５５，６３）がそれぞれ１つの絞り（７５，７７）を有しており、第１の吸込み管路（５５）の第１の絞り（７５）が、第２の吸込み管路（６３，１６３）第２の絞り（７７）よりも大きい流過横断面を有している、請求項１８記載の車両タンク。   The suction pipes (55, 63) each have one throttle (75, 77), and the first throttle (75) of the first suction pipe (55) is connected to the second suction pipe ( 63, 163) Vehicle tank according to claim 18, having a flow-through cross section larger than the second restriction (77). 前記内部容器が、残留タンクに通じるオーバーフロー（５３，１２７）を有している、請求項６から１９までのいずれか１項記載の車両タンク。   20. A vehicle tank according to any one of claims 6 to 19, wherein the inner container has an overflow (53, 127) leading to a residual tank. 第２の吸込み管路（１６３）の近傍に電気的なライン（１１５）が配置されている、請求項６から２０までのいずれか１項記載の車両タンク。   21. A vehicle tank according to any one of claims 6 to 20, wherein an electrical line (115) is arranged in the vicinity of the second suction line (163). 前記電気的なラインが、加熱ロッドとして構成されたホルダ内の抵抗ワイヤとして構成されている、請求項２１記載の車両タンク。   The vehicle tank according to claim 21, wherein the electrical line is configured as a resistance wire in a holder configured as a heating rod. ポンプ（５７）と圧力制御弁（６１）とが、１つの搬送モジュールにまとめられており、該搬送モジュールが内部容器若しくはポット形部分に固定されているか、かつ／又はタンクに固定されている、請求項１６から２２までのいずれか１項記載の車両タンク。   The pump (57) and the pressure control valve (61) are combined into one transfer module, which is fixed to the inner container or pot-shaped part and / or fixed to the tank, The vehicle tank according to any one of claims 16 to 22. 前記内部容器が前記搬送モジュール（１３３）と共に１つの機能ユニット（１３１）を形成しており、該機能ユニット（１３１）が全体で車両タンクから取り外し可能であって、車両タンク内の開口をカバー状に閉鎖するようになっている、請求項２２記載の車両タンク。   The inner container forms one functional unit (131) together with the transfer module (133). The functional unit (131) is removable from the vehicle tank as a whole, and the opening in the vehicle tank is covered. 24. The vehicle tank according to claim 22, wherein the vehicle tank is closed. 車両タンクが外部に向かって換気及び排気（１４１，１４５）されている、請求項１から２４までのいずれか１項記載の車両タンク。   25. A vehicle tank according to any one of claims 1 to 24, wherein the vehicle tank is ventilated and exhausted (141, 145) towards the outside. 前記換気若しくは排気が活性炭を介して行われる、請求項２５記載の車両タンク。   26. The vehicle tank according to claim 25, wherein the ventilation or exhaust is performed via activated carbon. 内燃機関の排ガス内の窒素酸化物を還元させる水溶性の還元剤を貯蔵するための車両タンク用の機能ユニットにおいて、該機能ユニットが、少なくとも１つのポンプ（５７）と、少なくとも１つの圧力調整弁（６１）と、電気的なヒータが組み込まれている少なくとも１つの内部容器（４３，１２９）と、該内部容器からポンプに通じる少なくとも１つの吸込み管路（５５；６３；１６３）とを有していることを特徴とする、機能ユニット。   In a functional unit for a vehicle tank for storing a water-soluble reducing agent that reduces nitrogen oxides in exhaust gas of an internal combustion engine, the functional unit includes at least one pump (57) and at least one pressure regulating valve. (61), at least one inner container (43, 129) incorporating an electric heater, and at least one suction line (55; 63; 163) leading from the inner container to the pump A functional unit characterized by
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JP5108770B2 (en) 2012-12-26
CN101263022A (en) 2008-09-10
EP1926626A2 (en) 2008-06-04
WO2007031467A2 (en) 2007-03-22
US20090065508A1 (en) 2009-03-12
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US8586895B2 (en) 2013-11-19
EP1926626B1 (en) 2019-02-27

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